Preventing LEDs from being corroded is an important part of improving LED reliability. This article analyzes the reasons why LEDs suffer from corrosion, and gives the main methods to avoid corrosion-to avoid LEDs from being close to harmful substances, and to effectively limit the concentration levels and ambient temperature of harmful substances.
The reliability of LED products is one of the important specifications used to estimate the life of LED products. Even under most different conditions, general LED products can continue to operate. However, once the LED is corroded and the LED is chemically reacted by the surrounding environment, the performance of the LED product will be reduced.
In order to prevent LEDs from being corroded, the best way is to keep LEDs away from harmful substances. Even small amounts of harmful substances can cause LED corrosion. Even if LEDs only come into contact with corrosive gases during processing, such as machinery in a production line, adverse effects may occur. In these cases, it is often possible to observe the LED assembly for damage prior to actual system setup. In particular, sulfur contamination should be avoided.
The following are some examples of substances that may contain corrosive substances (especially hydrogen sulfide) including:
O-ring (O-RING)
Washer
Organic rubber
Foam pad
Sealing rubber
Sulfur-containing vulcanized elastomers
Shock absorbers
If harmful substances cannot be completely avoided, LEDs with higher corrosion resistance should be used. However, remember - the effectiveness of limiting corrosion depends on the concentration of harmful substances. Even if you choose more durable LEDs, you should minimize exposure to these LED materials.
Typically, heat, humidity, light, etc. can accelerate the corrosion process. However, the main influencing factors are the concentration level of harmful substances and temperature, and limiting both will be an important way to protect LEDs.
